Narrative:Crashed into San Francisco Bay while on approach. The co-pilot dropped his microphone which jammed the controls, preventing the pilot from pulling out of the glide. Nine passengers and three crew died.

Probable Cause:

PROBABLE CAUSE: "Accidental jamming of the elevator controls as a result of a microphone being inadvertently dropped and lodging in such a position that the crew was unable to prevent rapid descent of the airplane."

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path. Distance from Burbank-Union Air Terminal to San Francisco Municipal Airport, CA as the crow flies is 521 km (326 miles).Accident location: Approximate; accuracy within a few kilometers.